Thanks Dave, and yes I've heard of Lams approved, I believe the 500 will be ok to ride according to Lams.
The reason I bought and are restoring the 500 is because I rode a mates 500 in '72, it was such a blast, light handled and revved its head off.
I've ridden Commandos, BSA Rocket 3, Triumphs had a '74 Bonnie 750 also a Trident, Hondas had a '72 750, and many others but I remember the 500 as the most fun to throw around and it went like the clappers.